Selection Notes
• Confirm the flow medium, such as gas, steam or clean liquids
• Verify the required pipe size, as Annubar probes are designed for various diameters
• Check the expected flow velocity, ensuring sufficient differential pressure is generated
• Choose suitable installation type, including insertion or flanged mounting
• In addition, confirm compatibility with a differential pressure transmitter such as the 3051 series
Why Choose the Rosemount 3051SFA Annubar
• Averaging Pitot Technology for Higher Accuracy
The Annubar uses multiple pressure sensing points along the probe. Therefore, it provides a more representative measurement of the flow profile.
• Low Permanent Pressure Loss
Unlike traditional orifice plates, the design minimizes pressure drop. As a result, energy efficiency improves across the system.
• Wide Application Flexibility
It works with gases, steam and liquids. In addition, it supports a wide range of pipe sizes and industrial processes.
• Easy Installation with Minimal Intrusion
The insertion design reduces installation complexity. Consequently, downtime during installation is minimized.
• Reliable Performance with Proven DP Technology
When combined with a differential pressure transmitter, it delivers stable and repeatable results. This makes it suitable for critical flow monitoring.
• Durable Industrial Construction
The probe is built from robust materials. Therefore, it performs well in high-temperature and high-pressure environments.
FAQ
Q: What is an Annubar flow meter?
A: It is an averaging pitot tube flow device that measures differential pressure across multiple sensing points to calculate flow rate.
Q: What media can it measure?
A: It is suitable for gases, steam and clean liquids, including compressed air and natural gas.
Q: How does it compare to orifice plates?
A: It offers lower pressure loss and easier installation, while maintaining good accuracy.
Q: Does it require a transmitter?
A: Yes. It is typically used with a differential pressure transmitter, such as the Rosemount 3051 series.









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